Note H - Stockholders' Equity - Stock Option Activity (Details) - USD ($)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Exercised (in shares)	(5,000)	0
Granted (in shares)	0	0
The 2009 Omnibus Stock Incentive Plan [Member]
Vested and exercisable (in shares)	135,000
Vested and exercisable, weighted average exercise price (in dollars per share)	$ 6.32
Exercised (in shares)	(5,000)
Exercised, weighted average exercise price (in dollars per share)	$ 7.50
Forfeited (in shares)
Forfeited, weighted average exercise price (in dollars per share)
Granted (in shares)
Granted, weighted average exercise price (in dollars per share)
Outstanding (in shares)	130,000
Outstanding, weighted average exercise price (in dollars per share)	$ 6.28
Outstanding, weighted average contractual term (Year)	1 year 215 days
Outstanding, aggregate intrinsic value	$ 700,000
Vested and exercisable (in shares)	130,000	135,000
Vested and exercisable, weighted average exercise price (in dollars per share)	$ 6.28	$ 6.32
Vested and exercisable, weighted average contractual term (Year)	1 year 215 days
Vested and exercisable, aggregate intrinsic value	$ 700,000